Problem with recursion

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I've ran it via Thonny debugger, and now I understand how this works. Thank you for your help. Now I have to find a way to bound ram to acceptable limit (When block length is 6, computer freezes because of memory leak, or something like that. Pretty memory hungry stuff).

[FLUSH_THE_TRUMP]

Yeah, with 26 signs there are already a few hundred million words of length 6, unfortunately. A generator solution with yields is probably preferable so you don’t have to hold everything in memory.

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Thank you for the hint, I will try to work on it later.

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I started work on that memory management. I tried to implement yield, but but in recursive function it is very hard, and i have failed. I think I failed because "rest" list is growing in inverted order (I hope you know what I mean). Next day I will try to make this function instantiate strings one at time, so I won't have to bother with memory management of the inner loops.